diff --git a/ruby/lib/jam_ruby/models/recorded_track.rb b/ruby/lib/jam_ruby/models/recorded_track.rb
index ee0cefa08..21e15cf6e 100644
--- a/ruby/lib/jam_ruby/models/recorded_track.rb
+++ b/ruby/lib/jam_ruby/models/recorded_track.rb
@@ -158,7 +158,7 @@ module JamRuby
     end
     
     def upload_sign(content_md5)
-      s3_manager.upload_sign(url, content_md5, next_part_to_upload, upload_id)
+      s3_manager.upload_sign(self[:url], content_md5, next_part_to_upload, upload_id)
     end
 
     def upload_part_complete(part, offset)